and they also warned that using russian rockets my violate sanctions against russia following the invasion of the crimean peninsula. it's only one of the bureaucratic battles elon musk is facing. he's also challenging various branches of the government with his electric car company tesla and his solar company, solar city. all three of these companies have benefited from substantial government support for the development of their technologies and ongoing tax incentives. cory johnson spoke with the author of "big bang disruption." he started asking if there should be government subsidies for emerging technologies like those musk receive for tesla. >> i think a really early technologies, university level research, it makes sense to fund that because otherwise it may not get started. but once it has gone commercial and solar has reached that point, it doesn't need this level of government involvement anymore and it has become counterproductive. >> have his businesses needed government involvement or used government money inordinately? >> they have all used it and at certain points, they've all